Don't play new animation on external intents

Playing this animation right after the task transition animation
causes a lot of jank. Removing it for external intents.

BUG=641592

Review-Url: https://codereview.chromium.org/2280233004
Cr-Commit-Position: refs/heads/master@{#414870}

chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java

@@ -792,8 +792,12 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
                     break;
                 case OPEN_NEW_INCOGNITO_TAB:
                     if (url == null || url.equals(UrlConstants.NTP_URL)) {
-                        if (fromLauncherShortcut) recordLauncherShortcutAction(true);
-                        if (TextUtils.equals(externalAppId, getPackageName())) {
+                        TabLaunchType launchType;
+                        if (fromLauncherShortcut) {
+                            getTabCreator(true).launchUrl(
+                                    UrlConstants.NTP_URL, TabLaunchType.FROM_EXTERNAL_APP);
+                            recordLauncherShortcutAction(true);
+                        } else if (TextUtils.equals(externalAppId, getPackageName())) {
                             // Used by the Account management screen to open a new incognito tab.
                             // Account management screen collects its metrics separately.
                             getTabCreator(true).launchUrl(
@@ -1291,7 +1295,8 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
                     intent, IntentHandler.EXTRA_INVOKED_FROM_SHORTCUT, false);
             return getTabCreator(isIncognito).launchUrl(
                     url,
-                    fromLauncherShortcut ? TabLaunchType.FROM_CHROME_UI : TabLaunchType.FROM_LINK,
+                    fromLauncherShortcut ? TabLaunchType.FROM_EXTERNAL_APP
+                            : TabLaunchType.FROM_LINK,
                     intent,
                     mIntentHandlingTimeMs);
         } else {

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/LayoutManagerChrome.java

@@ -91,6 +91,7 @@ public class LayoutManagerChrome
             // Open the new tab
             if (type == TabLaunchType.FROM_RESTORE) return;
             if (type == TabLaunchType.FROM_REPARENTING) return;
+            if (type == TabLaunchType.FROM_EXTERNAL_APP) return;
 
             tabCreating(getTabModelSelector().getCurrentTabId(), tab.getUrl(), tab.isIncognito());
         }